Swords dance

You create 4 crystals of magic force in shape of swords behind your back. You can dance with them between opponents and move them as you want. Every sword deal (1d8), you can split the damage between more then creatures. Saving throw : DEX, Damage type: Slashing, Area of effect: Touch, Duration: Up to 8 hours

Casting -> You begin by concentrating, often starts with glowing eyes. Then the sword appears behind you with swirling particles. When you attack the sword slightly shines.